• Contact Us
    • Send Feedback
    • Login
    View Item 
    •   Home
    • Journal and Journal Articles
    • Journal and Journal Articles
    • View Item
    •   Home
    • Journal and Journal Articles
    • Journal and Journal Articles
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    Whole Repository
    CollectionsIssue DateRegionCountryHubAffiliationAuthorsTitlesSubject
    This Sub-collection
    Issue DateRegionCountryHubAffiliationAuthorsTitlesSubject

    My Account

    Login

    Welcome to the International Institute of Tropical Agriculture Research Repository

    What would you like to view today?

    Response of corn genotypes to weed interference and nitrogen in Nigeria

    Thumbnail
    View/Open
    chikoye-response-2008.pdf (1.024Mb)
    Date
    2008
    Author
    Chikoye, D.
    Lum, A.F.
    Abaidoo, R.C.
    Menkir, A.
    Kamara, A.
    Ekeleme, F.
    Sanginga, Nteranya
    Type
    Journal Article
    Metadata
    Show full item record
    Abstract/Description
    The effects of nitrogen (N) rate and weed interference on the grain yield of four corn genotypes were investigated in 2002 and 2003 at Ikenne (7u389N, 3u429E), Shika (11u119N, 7u389E), and Samaru (10u249N, 7u429E) in Nigeria. Nitrogen (N) at 0, 30, 60, and 90 kg N ha21 were the main plot treatments. Weed-free (weeded weekly), low (intrarow weeds only), and high (zero weeding) weed pressure were the subplot treatments. Four corn genotypes (ACR8328 BN C7, Low-N-Pool C2, Oba Super II, TZB-SR) were the sub-subplot treatments. Weed density was higher at Shika and Samaru than at Ikenne, and the order of average weed biomass 8 to 10 weeks after planting was Samaru (271 g m22) . Ikenne (236 g m22) . Shika (161 g m22). Corn genotype and N rate had no effect on weed biomass except at Samaru where fertilized treatments had higher weed biomass than the unfertilized treatments. Corn leaf area (LA) increased with increasing N rate at all locations regardless of weed pressure and genotype, except at Shika where ACR8328 BN C7, Oba Super II, and TZBSR did not show any clear N response; LA was highest in the weed-free and lowest in the unfertilized treatments for all genotypes and locations, and weed pressure treatments. Low-N-Pool C2 had the highest LA, which was 1.3 times larger than in Oba Super II, which had the lowest LA. Nitrogen rate, weed pressure, and genotypes significantly affected corn leaf chlorophyll content. Chlorophyll content was higher in the fertilized treatments than the unfertilized treatments, and higher in the weed-free treatments than the low or high weed pressure treatments. ACR8328 BN C7 and Oba Super II had significantly more chlorophyll than the other genotypes. Low-N-Pool C2 showed a linear grain yield response with the increase in N rates. ACR8328 BN C7 did not respond to N application. Compared with the results in the weed-free treatment, high weed pressure reduced grain yield in all genotypes by more than 65% at Samaru, 50% at Shika, and 35% at Ikenne.
    https://dx.doi.org/10.1614/WS-07-055.1
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/2927
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.1614/WS-07-055.1
    IITA Subjects
    Genetic Improvement; Plant Genetic Resources; Maize; Plant Production; Food Security; Disease Control; Markets; Food Science; Handling, Transport, Storage And Protection Of Agricultural Products; Livelihoods; Nutrition; Plant Diseases
    Agrovoc Terms
    Forest Savanna Transition; Guinea Savannah; Soil Fertility; Weed Pressure; Chlorophyll Weed Biomass; Genotypes
    Regions
    Africa; West Africa
    Countries
    Nigeria
    Collections
    • Journal and Journal Articles4835
    copyright © 2019  IITASpace. All rights reserved.
    IITA | Open Access Repository